Police have used helicopters and bloodhounds to search for missing Juilliard (search) student Sarah Fox (search), but the whereabouts of the young upper Manhattan woman remained a mystery yesterday.

Cops "don't have any leads," said Fox's roommate, Patrick Dall'Occhio, the last person known to have seen the third-year drama student.

Fox, 21, disappeared Wednesday after leaving her Isham Street apartment in Inwood in the late afternoon wearing black spandex pants and a white T-shirt with a cut collar and a decal on its front, and carrying her CD player and keys.

"She didn't have her driver's license with her, or credit cards or MetroCard," Dall'Occhio said.

For that reason, he and police believe that Fox may have been on her way to jog in nearby Inwood Hill Park (search), or to work out at a gym on 181st Street.

Anyone with information about Fox can call the 34th Precinct at (212) 927-9712 or a police tip line at (646) 391-4923.

Additional reporting by Larry Celona

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